The methyl ether derivatives 2, 4 and 6 of the mulberry Diels-Alder adducts chalcomoracin (1) and mulberrofuran C (3) and kuwanon J (5) respectively have been synthesized by a thermal [4 + 2]-cycloaddition reaction between a chalcone and dehydroprenyl diene. A H-bonded ortho OH substituent on the chalcone was found to be essential for Diels-Alder reactivity. Density functional theory calculatio...

Chalcones, or 1,3–diaryl–2–propen–1–ones, one of the major classes of natural products and posses many useful properties like anticancer, antibacterial, antifungal, anti–inflammatory, antimalarial and anti–diabetic activity. We report in this communication the synthesis and anticancer study of a number of novel chalcone sulfonamides. Our results indicate that the synthesis of chalcone sulfonami...

Chalcones, or 1,3–diaryl–2–propen–1–ones, one of the major classes of natural products and posses many useful properties like anticancer, antibacterial, antifungal, anti–inflammatory, antimalarial and anti–diabetic activity. We report in this communication the synthesis and anticancer study of a number of novel chalcone sulfonamides. Our results indicate that the synthesis of chalcone sulfonami...

A number of novel heterocyclic chalcone derivatives can be synthesized by thermal and microwave tools. Treatment of 4-(4-Acetylamino- and/or 4-bromo-phenyl)-4-oxobut-2-enoic acids with hydrogen peroxide in alkaline medium were afforded oxirane derivatives 2. Reaction of the epoxide 2 with 2-amino-5-aryl-1,3,4-thiadiazole derivatives yielded chalcone of imidazo[2,1-b]thiadiazole derivative 4 via...

Michael addition reaction of the 2-amino-1,3,4-thiadiazole to chalcone as biselectrophile afforded 5,7-diphenyl-6-[1,3-diphenylpropan-1-on-3-yl][1,3,4]thiadiazolo[3,2-a]pyrimidine (3) instead of 5,7-diphenyl-5H-[1,3,4]thiadiazolo[3,2-a]pyrimidine (5) via further Michael addition at C5 in pyrimidine moiety. The structure 3 was established through the aspect of ab initio calculations, elemental a...